I have SortedMap in Servlet to populate drop down values in JSP and I have the following code
SortedMap<String, String> dept = findDepartment();
request.setAttribute("dept ", dept);
and in JSP
<select name="department">
<c:forEach var="item" items="${dept}">
<option value="${item.key}">${item.value}</option>
</c:forEach>
</select>
I am using one JSP page for insert and update. When I am editing the page how can I set selected value to drop down where selected value will come from database.
This question is related to
jsp
drop-down-menu
jstl
retain
I tried the accepted answer, it did not work.
However the simple way to do it is below:-
<option value="1" <c:if test="${item.quantity == 1}"> <c:out value= "selected=selected"/</c:if>>1</option>
<option value="2" <c:if test="${item.quantity == 2}"> <c:out value= "selected=selected"/</c:if>>2</option>
<option value="3" <c:if test="${item.quantity == 3}"> <c:out value= "selected=selected"/</c:if>>3</option>
Enjoy!!
I think above examples are correct. but you dont' really need to set
request.setAttribute("selectedDept", selectedDept);
you can reuse that info from JSTL, just do something like this..
<!DOCTYPE html>
<html lang="en">
<%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@taglib prefix="fn" uri="http://java.sun.com/jsp/jstl/functions" %>
<head>
<script src="../js/jquery-1.8.1.min.js"></script>
</head>
<body>
<c:set var="authors" value="aaa,bbb,ccc,ddd,eee,fff,ggg" scope="application" />
<c:out value="Before : ${param.Author}"/>
<form action="TestSelect.action">
<label>Author
<select id="Author" name="Author">
<c:forEach items="${fn:split(authors, ',')}" var="author">
<option value="${author}" ${author == param.Author ? 'selected' : ''}>${author}</option>
</c:forEach>
</select>
</label>
<button type="submit" value="submit" name="Submit"></button>
<Br>
<c:out value="After : ${param.Author}"/>
</form>
</body>
</html>
i tried the last answer from Sandeep Kumar, and i found way more simple :
<option value="1" <c:if test="${item.key == 1}"> selected </c:if>>
If you don't mind using jQuery you can use the code bellow:
<script>
$(document).ready(function(){
$("#department").val("${requestScope.selectedDepartment}").attr('selected', 'selected');
});
</script>
<select id="department" name="department">
<c:forEach var="item" items="${dept}">
<option value="${item.key}">${item.value}</option>
</c:forEach>
</select>
In the your Servlet add the following:
request.setAttribute("selectedDepartment", YOUR_SELECTED_DEPARTMENT );
Maybe I don't completely understand the accepted answer so it didn't work for me.
What i did was simply to check if the variable is null, assign it to a known value from my database. Which seems to be similar to the accepted answer whereby you first declare an known value and set it to selected
<select name="department">
<c:forEach var="item" items="${dept}">
<option value="${item.key}">${item.value}</option>
</c:forEach>
</select>
because none of the options are selected, thus item = null
<%
if(item == null){
item = "selectedDept"; //known value from your database
}
%>
This way if the user then selects another option, my IF clause will not catch it and assign to the fixed value that was declared at the start. My concept could be wrong here but it works for me
Below is Example of simple dropdown using jstl tag
<form:select path="cityFrom">
<form:option value="Ghaziabad" label="Ghaziabad"/>
<form:option value="Modinagar" label="Modinagar"/>
<form:option value="Meerut" label="Meerut"/>
<form:option value="Amristar" label="Amristar"/>
</form:select>
You can try one even more simple:
<option value="1" ${item.quantity == 1 ? "selected" : ""}>1</option>
Source: Stackoverflow.com